Flatland是一个跨平台的面向对象的2D碰撞检测库，使用C++编写，*面，压缩包中附带两个例子，使用openGL编写。-Flatland is a simple cross-platform object-oriented 2D collision library. It presents a C++ interface to the Open Dynamics Engine physics SDK. Flatland does not handle graphics, but two s